Feed-water heater.



R. HOUSE.

FEED WATER HEATER.

APPLICATION man on. 5. m5.

1 ,1 89, 1 1 1 Patented June 27, 1916.

- '2 SHEETS-SHEET llily ease.

R. HOUSE.

FEED WATER HEATER.

APPLICATION FILED OCT. 5, 1915.

. Patented J1me 27,1916.

2 SHEETS-SHEET 2.

B COLUMBIA FMNOGRAPH co., WASHINGTON. D. c.

ROBERT HOUSE, OF ST. MARYS, PENNSYLVANIA.

FEED-WATER HEATER.

Specification of Letters Patent. 'Patented J n 27 1916.

Application filed October 5, 1915. Serial No. 54,237.

To all whom it may concern Be it known that I, ROBERT HoUsE, a citizenof the United States, residing at St. Marys, in the county of Elk andState of Pennsylvania, have invented certain new and useful Improvementsin Feedater Heaters; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

The invention relates to improvements in feed water heaters.

The object of the present invention is to improve the construction offeed water heaters and to provide a simple, practical and highlyetlicient feed water heater adapted to be applied to any ordinary boilerand adapted when an injector or pump is in operation to cause a flow ofwater from the injector or pump through superheater tubes arrangedwithin the boiler tubes in the path of the products of combustion sothat the water passing through the superheater tubes will be heated to atempera ture corresponding with that of the water in the boiler so thatthere will be no reduction in boiler temperature when the feed water isintroduced into the same.

A. further object of the invention is to provide a feed water heater ofthis character equipped with means for automatically connecting thesuperheater tubes with the interior of the boiler when the injector isstopped so that there will be a circulation of water through the heatingtubes to prevent the same from burning out.

IVith these and other objects in view the invention consists in theconstruction and novel combination and arrangement of parts hereinafterfully described, illus trated in the accompanying drawings and pointedout in the claims hereto appended, it being understood that variouschanges in the form, proportion and minor details of construction may beresorted to without departing from the spirit or sacrificing any of theadvantages of the invention.

In the drawings Figure 1 is a longitudinal sectional view of the boilerprovided with a feed water heater constructed in accordance with thisinvention, Fig. 2 is a horizontal sectional view of the same on the line2-2 of Fig. 1, Fig. 3 is a transverse sectional view the feed Waterheater being shown in elevation, Fig. i is an enlarged detail sectionalview of the double check valve, Fig. 5 is an enlarged detail sectionalview illustrating the arrangement of the heating tubes.

Like numerals of reference designate corresponding parts in the severalfigures of the drawings.

In the accompanying drawings in which is illustrated the preferredembodiment of the invention, the feed water heater comprises in itsconstruction a plurality of heating tubes or superheater tubes connectedat their front ends at a point in advance of the front boiler sheet 2 bya transverse pipe 3 and located within the boiler tubes 4: so that theproducts of combustion passing through the boiler tubes will impinge.against them and heat the feed water to the temperature of the waterwithin the boiler and thereby prevent any reduction in the boilertemperature when the feed water is introduced into the same. In theaccompanying drawings two heatlng tubes are shown but a greater numberof course may be employed to provide a circulation back and forththrough the boiler tubes to effect the desired heating of the feedwater. The feed water enters the heating tubes from an inlet pipe 5, andit enters the boiler 6 after leaving the heating tubes 1 by a returnpipe or feed pipe 7 having a branch 8 extending into the boiler at thelower portion thereof. The heating tubes are preferably located at theupper portion of the boiler and the pipe 7 extends downwardly from theupper portion of the boiler to the lower portion thereof as shown inFig. 1 of the drawings.

The' inlet pipe is connected by a union or coupling 9 with anintermediate horizontally disposed tubular arm or portion 10 of a doublecheck valve having a vertically disposed body portion 11 which isconnected at its upper end with the boiler by a pipe 11. The valve bodyis provided at its upper and lower portions with valve seats 12 and 13with which cooperate upper and lower check valves 14: and 15 havingouter flanged guiding portions 16 and '17 operating in upper and lowertubular members l8 and 19 which form the said valve seats. The lower endof the check valve body is designed to be connected with an injector andwhen the injector is Working water flows into the feed water heater andlifts the lower check valve and closes the upper check valve and passesthrough the heating tubes and into the boiler but when the injectorisnot working the boiler pressure and the weight of the valve opens theupper valve and closes the lower valve and establishes a circulationthrough the heating tubes from the boiler so that there will be water inthe heating tubes at all times and there will be no liability of theheating tubes burning out. The upper valve is provided with a dependingvalve stem 20 operating in a tubular guide 21 and interiorly threaded at22 to receive a threaded portion 23 of a screw which has a head 2% atits lower end rounded at 25 to fit a concavity or seat 26 in the upperend of the lower check valve. The screw adjustably engages theinteriorly threaded stem and a washer 27 is interposed between the headof the screw and the lower end of the tubular stem. The washer may bevaried iii thickness and one or more washers may be employed to vary thelength of the valve stem and the adjustable member formed by the screwto cause a proper seating of the valve in the operation. of the feedwater heater. Any other suitable means may, however, be employed forproviding an adjustable connection be tween the upper and lower valvesso that when one of the valves Opens to the desired extent the othervalve will be properly seated. The guide 21 which is formed integralwith the body of the casing is located opposite the intermediate tubulararm or portion 10 and the double check valve which is preferablyarranged in a vertical posi tion may of course be disposed. in any othersuitable manner to suit requirements. The heating tubes are arranged inspaced relation with the boiler tubes and may be supported in anydesired manner as by rings 28 having openings 29 for the passage of theproducts of combustion.

\Vhat is claimed is:

l. A feed water heater of the class de scribed including heating tubesdesigned to be arranged in the boiler tubes of an engine, a supply pipeconnected with the heating tubes and the boiler, an inlet pipecommunicating with. the heating tubes for supplying the same with water,a double check valve comprising a body having spaced valve seats, aninterposed guide, spaced check valves coacting with the seat andadjusting means interposed between the valves and operating in the saidguide.

A feed water heater of the class described including heating tubesdesigned to be arranged in the boiler tubes of an engine, a supply pipeconnected with the heating tubes and the boiler, an inlet pipecommunicating with the heating tubes for supplying the samewith water, adouble check valve comprising a body having spaced valve seats, aninterposed guide, spaced check valves coacting with the seat, one of thecheck valves being provided with a stem operating in the said guide anda threaded member adjustably connected with the stem and arranged toengage the other check valve. N

A feed water heater of the class described including heating tubesdesigned to be arranged. in the boiler tubes of an engine, a supply pipeconnected with the heating tubes and the boiler, an inlet pipecommunicating with the heating tubes for supplying the same with water,a double check valve comprising a body having spaced valve seats, aninterposed guide, spaced check valves coacting with the seat,

one of the check valves being provided with a concavity: and the othercheck valve having a tubular stein operating in the said guide andinteriorly threaded, and a screw engaging the threaded stem and having arounded head adapted to fit in the concavity of the check valve.

In testinionv whereof I afiix my signature in presence of two witnesses.

, 7 ROBERT HOUSE. lVitnesses THOMAS M. I'IIGKEY, CHAS. J. SOHANT.

Copies of th'li p'at'iit my be obtained for java fce'nts cifemtyeddicsshig the "Commissionci' of Patents. wnma m, "D. G.

